don't depend on the old package.
bump version
Merge remote-tracking branch 'jdnavarro/master'

Conflicts:
	crypto-numbers.cabal
provide a standard header for F2m
add documentation
add expSafe and expFast
use faster GMP primitives where available
use GMP miller-rabin test if available
use GMP find next prime facility for findPrimeFrom
workaround the fact that gmp requires the modulo to be odd.

When doing a powModSec, gmp FPE if the modulo is even.
In the case where the modulo is even, we use the standard non secure version.
Document this fact, and also note that it is fine as for RSA, DH, DSA ..
the modulo is either prime or the product of primes.
use expSafe in the old exponentiation names.
bump version to 0.2.2
fix the order of the assertion expected vs equal.
add a serialization tests for i2ospOf
speed up serialization primitives using GMP.

using the new GMP primitive to export and import integer,
we can save quite a bit of time from doing it in loopy pure haskell.
add a header for Serialize module
remove warnings
properly handle the case where integer-gmp is not enabled as reported by hvr.
bump LICENSE years
bump version to 0.2.3